[英]how to display arraylist items in toast?
我正在使用 json 解析,我發送了五封電子郵件和五個姓名,作為回應,它給出了
{
"invitefriend": [
{
"message": "Friend Request sent to : abc"
},
{
"message": "Friend Request sent to : def"
}
]
}
現在我正在嘗試的是我想在吐司中獲得 abc 和 def,但它分別給出
JSONArray jsonary=json.getJSONArray("invitefriend");
for (int i = 0; i < jsonary.length(); i++) {
JSONObject c = jsonary.getJSONObject(i);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
// map.put(INTERESTACCEPT_USER_ID, c.getString(INTERESTACCEPT_USER_ID));
map.put(TAG_SUCCESS_INVITE,c.getString(TAG_SUCCESS_INVITE));
map.put(TAG_SUCCESS_MESSAGE, c.getString(TAG_SUCCESS_MESSAGE));
ArrayList<String> msgs=new ArrayList<String>();
msgs=map.put(TAG_SUCCESS_MESSAGE, c.getString(TAG_SUCCESS_MESSAGE));
System.out.println("MESSAGE : " + msg);
// adding HashList to ArrayList
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getActivity(),""+msgs, Toast.LENGTH_LONG).show();
}
});
data.add(map);
}
嘗試這個,
JSONArray jsonary=json.getJSONArray("invitefriend");
ArrayList<String> msgs;
for (int i = 0; i < jsonary.length(); i++) {
JSONObject c = jsonary.getJSONObject(i);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
// map.put(INTERESTACCEPT_USER_ID, c.getString(INTERESTACCEPT_USER_ID));
map.put(TAG_SUCCESS_INVITE,c.getString(TAG_SUCCESS_INVITE));
map.put(TAG_SUCCESS_MESSAGE, c.getString(TAG_SUCCESS_MESSAGE));
msgs = new ArrayList<String>(map.values());
System.out.println("MESSAGE : " + msgs);
// adding HashList to ArrayList
data.add(map);
}
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getActivity(),msgs,Toast.LENGTH_LONG).show();
}
});
您將獲得多個Toast
s,因為您在for
循環內進行了Toast
ing。 只需將該調用移動到循環外:
JSONArray jsonary=json.getJSONArray("invitefriend");
ArrayList<String> msgs=new ArrayList<String>();
String msg = null;
for (int i = 0; i < jsonary.length(); i++) {
JSONObject c = jsonary.getJSONObject(i);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
// map.put(INTERESTACCEPT_USER_ID, c.getString(INTERESTACCEPT_USER_ID));
map.put(TAG_SUCCESS_INVITE,c.getString(TAG_SUCCESS_INVITE));
map.put(TAG_SUCCESS_MESSAGE, c.getString(TAG_SUCCESS_MESSAGE));
msg=map.put(TAG_SUCCESS_MESSAGE, c.getString(TAG_SUCCESS_MESSAGE));
msgs.add(msg);
System.out.println("MESSAGE : " + msg);
// adding HashList to ArrayList
data.add(map);
}
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getActivity(), msgs.toString(), Toast.LENGTH_LONG).show();
}
});
此外,我們還定義了ArrayList
msgs
來收集響應消息,我們直接使用msgs.toString()
Toast
。
你必須做 ""+array list 然后它會在 toast 中顯示所有數組列表項。 或者,如果您需要一個一個,然后使用一個具有數組列表長度的 for 循環,您只需添加數組列表[i]like
for (int i=0;i<=arraylist.length;i++){
Toast.makeText(getContext(),arraylist[i],Toast.LENGTH_SHORT).show();
}
像這樣嘗試。 我認為它有幫助
featured_list = new ArrayList<Featured>();
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
Toast.makeText(getApplicationContext(), object.getString("thumb").toString(), Toast.LENGTH_LONG).show();
}
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